Filling tube for liquid receptacles



Apr. 10, 1923.

B. F. ALLNUTT FILLING TUBE FOR LIQUID RECEPTACLES Filed Aug. 10, 1921 Patented Apr. 10; 1923.

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BENJAMIN F. ALLNUTT, OF CHICAGO, ILLINOIS.

FILLING TU BE FOR LIQUID RECEPTACLES.

Application filed August 10, 192i. Serial No. 491,078.

To all whom it may concern:

Be it known that I, BENJAMIN F. ALL- NUTT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Filling Tubes for Liquid Receptacles, of which the following is a specification.

The invention relates to improvements in filling tubes for liquid receptacles, and it is especially well adapted for use in receptacles in which gasoline, benzine, naphtha and other explosive liquids,.volatile at a relatively low degree and of high explosive character are to be contained.

The particular use for which the device is best suited is in connection with gasoline storage tanks of automobiles, and the like, in which air is drawn into the tank to displace the liquid or gas taken therefrom to supply the engine.

One of the objects of the invention is to provide an air strainer to prevent entrance of dust into the reservoir, or tank. Another object is to provide a liquid strainer having openings therein equal or greater in volume than the axial opening of the tube,

so that the permeable side wall will not interpose any-material retarding effect or resistance to the flow of liquid when the tank is being filled.

Another object isto provide an improved closure for the filling tube.

Another object is to provide a resident closure for the filling opening in the tank,

which will automatically close said opening after the filling tube has been removed from the tank.-

Another object is to generally improve structures of this character.

Other and more specific objects and advantages will readily appear from a consideration of the specification when taken in conjunction with the accompanying drawing, forming a part hereof wherein;

Fig. 1 is a longitudinal, axial section of the device.

Fig. 2 is an elevation of the device as it appears in a tank.

Fig. 3 is a transverse section taken between the cap and flange of Fig. 1.

In all the views the same reference characters indicate similar parts. I I

The tube 5 is foraminous in character, such as may be made of a closely perforated sheet of metal or wire cloth and of such mesh her.

or apertures that all objectionable matter held in suspension will be caught in the tube. The vertlcal wall of the tube has openings equal or greater in the aggregate volume than its bore, so as no-tto'impede the incoming liquid by restricting its flow. When the tank is nearly full the pressure of the incoming liquid will cause its flow throughout the entire length thereof into the tank, so that the entire length of tube is available at all times to convey the liquid.

An imperforate guard tube 6, relatively short in length is placed in the upper end of the strainer tube, to protect the latter from injury and to provide an air space 7 between the tubes into which liquid from the filling nozzle can not enter, so that air from the tank may pm freely therefrom as the tank is being filled with liquid. The guard tube 6 terminates at its upper end 1n a screw threaded head 8 which is provided with axial, circumferentially extending openings 9 which communicate with the air space therebelow. The head 8 is threaded as at 10, for insertion in an internally threaded flange 11. The tube 5 'is soldered or otherwise secured at its upper end to guard tube 6; it.may, therefore, be withdrawn from the flange. i

The flange 11 is to be secured above an opening in a tank 12 in any suitable man- A closure 13 for the, flange 11 is provided with laterally extending arms 14 and 15, hinged to arms 16 and 17 respectively, that extend laterally from one side of the flange 11. A pintlepin 18 passes through all of the aforesaid arms and a spring 19 is wound about the pin to yieldingly hold the closure on the flange 11 to close the opening in the tank whether the tube 5 is therein or not. A heel 20 projects from the hinge member 14 for contact with the flange 11 and operates as a stop to limit the extent to which the closure may be moved on its hinges. The closure 13 consists of the cupshape member 21 to which thearms 14 and 15 are attached, which is screw threaded, at

'22. to receive an imperforate cover 23, which is threaded at 24 to engage the threads 22. The member 21 is perforated through its wall, at 25, for entrance of air into the chamber 26. Near the axis of the member 21, and projecting outwardly therefrom, is a hollow hub, 27, perforated as at 28 for entrance of air into its axial bore 29. There is also a hollow hub 30 threaded internally and exlite material, has become dust laden it may be taken from the chamber and cleaned and re placed, or new material of like character ma be substituted. I

wing to the relatively large capacity of i the holes 25 and of the fibrous filtering material, there is very slight resistance interposed to the incoming air.

It will be understood, of course, that the tendency towards vacuum in the tank 12, due to the discharge of liquid therefrom unseats the valve 31 which permits the entrance of air into the tank through the air strainer described and, to an extent,'satisfies the vacuum tendency, at the same time thedust and other material, in a finely divided state, carried by the incoming air, is strained out and caught by the fibrous material in the chamber 26, water resulting from rain, or snow, can not enter the tank with the air owing to the overhanging flange 35 which extends downwardly from the cover cap 23.

When the closure 18 swung on its hinges to till the tank the air chamber and surrounding casing is movable with it, and the closure is resident with the tank and is not .plosion of the very volatile liquids to be contained in the tank, on the principle of the saigevtg lamp of Sir Humphrey Davy.

ile one embodiment of the invention has been herein disclosed it will be manifest that changes may be made in the arrangement-and disposition of the parts Within the scope of the appended claim.

Having described my invention what I claim as new and-desire to secure by Letters Patent, is;

A filling structure for a liquid receptacle comprising a flanged internally threaded collar for permanent attachment to a receptacle; a closure cap hinged thereto providing an inwardly extending concentric hollow hub; an inwardly opening check valve within the hub; means within the hub to adjust the valve; a screw cap closing the outer end of the closure cap; a foraminous tube insertible within the tank through said collar and an imperforate guard tube Within the foraminous tube attached thereto and having a threaded head for threaded engagement with the threads of the flanged collar.

In testimony whereof I hereunto subscribe my name.

BENJAMIN F. ALLNUTT. 

